Alert archive / Alabama / Wind Advisories in 2021

Wind Advisory 6, NWS Birmingham, AL

April 14, 20215 counties in Alabama

NWS Birmingham, AL issued this wind advisory at Apr 14, 2021, 3:01 PM CDT for 5 counties in Alabama. It was in force for 119 min.

The area

The counties it named.

The facts

Issued
Apr 14, 2021, 3:01 PM CDT (20:01 UTC)
Expired
Apr 14, 2021, 5:00 PM CDT
In force
119 min
Issued by
NWS Birmingham, AL

Counties Autauga County, AL, Dallas County, AL, Lowndes County, AL, Marengo County, AL, Sumter County, AL

The radar

The Birmingham radar (KBMX), 101 km from the middle of the area, began a volume at 20:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 8.0 hours before the alert went out and 101 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Birmingham, AL at 12:00Z on 2021-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2021-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2152 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
97 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

145 
WWUS74 KBMX 142001
NPWBMX

URGENT - WEATHER MESSAGE
National Weather Service Birmingham AL
301 PM CDT Wed Apr 14 2021

ALZ030-039>042-142200-
/O.NEW.KBMX.WI.Y.0006.210414T2001Z-210414T2200Z/
Sumter-Marengo-Dallas-Autauga-Lowndes-
Including the cities of Livingston, Demopolis, Linden, Selma, 
Prattville, Fort Deposit, and Hayneville
301 PM CDT Wed Apr 14 2021

...WIND ADVISORY IN EFFECT UNTIL 5 PM CDT THIS AFTERNOON...

* WHAT...Southerly winds of 20 mph gusting to 35 to 40 mph.

* WHERE...Sumter, Marengo, Dallas, Autauga and Lowndes Counties.

* WHEN...Until 5 PM CDT this afternoon.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.

* ADDITIONAL DETAILS...The winds will primarily be on the backside
  of the rain area moving through.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$

Nearby

Wind Advisories in Alabama, 2021Every wind advisory in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.